PTFE membrane filters have an excellent chemical compatibility (pH 1 to 14), so that they are also used for the filtration of solvents and acids, to which other filter types are not resistant. (sartorius.com)

These molecules, which are chemically grafted to the PTFE surface, allow the particles to disperse easily in both aqueous and solvent media without the need for added surfactants or stabilizers that can interfere with desired properties. (polysciences.com)

5. The dual porosity tube of claim 1, wherein the average particle size of the PTFE resin of the first billet and the average particle size of the PTFE resin of the second billet are different. (google.es)

6. The dual porosity tube of claim 5, wherein the average particle size of the PTFE resin in the first billet is less than or equal to about 200 μ. (google.es)

PTFE envelop gasketis a non-metallic gaskets ,general consists of two parts of the coating and inserts.The coating of PTFE envelop gasketmainly plays the role of corrosion,usually made of PTFE .The inserts (fil. (burrillandco.com)

4. The dual porosity tube of claim 1, wherein the dual porosity tube has a microstructure having internodal distances at inner and outer surfaces of the dual porosity PTFE tube within a range of about 0.10-200 μ. (google.es)

8. The dual porosity PTFE tube as in claim 1, wherein the first tubular billet is an inner billet and the second tubular billet is an outer billet. (google.es)